Question

По течению реки теплоход прошел 65 км за 5 часов а 24 км против течения - за 3 часов. Найдите собственную скорость теплохода

Answer 1

1) 65:5=15 км/ч - скорость движения по течению.
2) 24:3=8 км/ч - скорость движения против течения.
3) (15+8):2=23/2=11,5 км/ч - собственная скорость теплохода.
4) (15-8):2=7/2=3,5 км/ч - скорость течения реки.

Answer 2

Calculation of the Speed of the Boat

To find the speed of the boat, we can use the formula: speed = distance / time.

Let's calculate the speed of the boat when it is moving with the current and against the current separately.

1. Speed of the boat with the current: - Distance: 65 km - Time: 5 hours - Using the formula, speed = distance / time, we can calculate the speed of the boat with the current: 65 km / 5 hours = 13 km/h.

2. Speed of the boat against the current: - Distance: 24 km - Time: 3 hours - Using the formula, speed = distance / time, we can calculate the speed of the boat against the current: 24 km / 3 hours = 8 km/h.

Therefore, the speed of the boat in still water, also known as its own speed or the speed of the boat without any external factors, is 13 km/h when moving with the current and 8 km/h when moving against the current.

Please note that these calculations assume a constant speed throughout the journey and do not take into account any other factors that may affect the speed of the boat.